|  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #44094 SEGFAULT when using mysql_connect()
Submitted: 2008-02-10 21:42 UTC Modified: 2008-02-12 10:24 UTC
From: gmsoft at gentoo dot org Assigned:
Status: Closed Package: Reproducible crash
PHP Version: 5.2CVS-2008-02-10 (snap) OS: Linux playa #1 Fri Jan
Private report: No CVE-ID: None
View Add Comment Developer Edit
Welcome! If you don't have a Git account, you can't do anything here.
You can add a comment by following this link or if you reported this bug, you can edit this bug over here.
Block user comment
Status: Assign to:
Bug Type:
From: gmsoft at gentoo dot org
New email:
PHP Version: OS:


 [2008-02-10 21:42 UTC] gmsoft at gentoo dot org
php crash when running cacti poller. Most probably not related to cacti only. Previous version like 5.2.5 used to work fine.

This doesn't seem to occur if build without -O2.

Reproduce code:
This occurs when using cacti poller.php or when browsing cacti trough apache. Didn't identified the exact code.

Actual result:
(gdb) bt
#0  0x082db06a in zend_do_fcall_common_helper_SPEC (execute_data=0xbff54dbc) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:205
#1  0x082cd37a in execute (op_array=0x892b9dc) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:92
#2  0x082dac2b in zend_do_fcall_common_helper_SPEC (execute_data=0xbff552ec) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:234
#3  0x082cd37a in execute (op_array=0x892066c) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:92
#4  0x082dac2b in zend_do_fcall_common_helper_SPEC (execute_data=0xbff5559c) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:234
#5  0x082cd37a in execute (op_array=0x87d0268) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:92
#6  0x082dac2b in zend_do_fcall_common_helper_SPEC (execute_data=0xbff564cc) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:234
#7  0x082cd37a in execute (op_array=0x87a57fc) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:92
#8  0x082d16ef in ZEND_INCLUDE_OR_EVAL_SPEC_TMP_HANDLER (execute_data=0xbff57a2c) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:4614
#9  0x082cd37a in execute (op_array=0x879a910) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend_vm_execute.h:92
#10 0x082acb68 in zend_execute_scripts (type=8, retval=<value optimized out>, file_count=3) at /var/tmp/portage/php-test/php5.2-200802101930/Zend/zend.c:1134
#11 0x08265f0f in php_execute_script (primary_file=0xbff59e64) at /var/tmp/portage/php-test/php5.2-200802101930/main/main.c:2006
#12 0x0833e1ef in main (argc=2, argv=0xbff59f84) at /var/tmp/portage/php-test/php5.2-200802101930/sapi/cli/php_cli.c:1140

Full backtrace :


Add a Patch

Pull Requests

Add a Pull Request


AllCommentsChangesGit/SVN commitsRelated reports
 [2008-02-10 21:48 UTC] gmsoft at gentoo dot org
Configure Command =>  './configure'  '--prefix=/usr/lib/php5' '--host=i686-pc-linux-gnu' '--mandir=/usr/lib/php5/man' '--infodir=/usr/lib/php5/info' '--sysconfdir=/etc' '--cache-file=./config.cache' '--enable-cli' '--disable-cgi' '--with-config-file-path=/etc/php/cli-php5' '--with-config-file-scan-dir=/etc/php/cli-php5/ext-active' '--without-pear' '--disable-bcmath' '--with-bz2' '--disable-calendar' '--without-curl' '--without-curlwrappers' '--disable-dbase' '--enable-exif' '--without-fbsql' '--without-fdftk' '--disable-filter' '--enable-ftp' '--with-gettext' '--without-gmp' '--disable-hash' '--disable-json' '--without-kerberos' '--enable-mbstring' '--without-mcrypt' '--with-mhash' '--without-msql' '--without-mssql' '--with-ncurses' '--with-openssl' '--with-openssl-dir=/usr' '--disable-pcntl' '--disable-pdo' '--with-pgsql' '--disable-posix' '--without-pspell' '--without-recode' '--disable-simplexml' '--disable-shmop' '--with-snmp' '--disable-soap' '--enable-sockets' '--without-sybase' '--without-sybase-ct' '--disable-sysvmsg' '--disable-sysvsem' '--disable-sysvshm' '--without-tidy' '--disable-tokenizer' '--disable-wddx' '--disable-xmlreader' '--disable-xmlwriter' '--without-xmlrpc' '--without-xsl' '--enable-zip' '--with-zlib' '--disable-debug' '--enable-dba' '--without-cdb' '--with-db4' '--without-flatfile' '--with-gdbm' '--without-inifile' '--without-qdbm' '--with-freetype-dir=/usr' '--with-t1lib=/usr' '--disable-gd-jis-conv' '--with-jpeg-dir=/usr' '--with-png-dir=/usr' '--without-xpm-dir' '--with-gd' '--with-imap' '--with-imap-ssl' '--with-ldap' '--without-ldap-sasl' '--with-mysql=/usr' '--with-mysql-sock=/var/run/mysqld/mysqld.sock' '--without-mysqli' '--with-readline' '--without-libedit' '--without-mm' '--without-sqlite' '--with-pic'
 [2008-02-11 14:24 UTC]
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

 [2008-02-11 16:16 UTC] gmsoft at gentoo dot org
Narrowed it down. This test triggers the segfault :

php -r 'echo mysql_connect('localhost', 'root', 'password', true, 128);'
 [2008-02-11 22:22 UTC] hoffie at gentoo dot org
Ok, I narrowed it down further. The problem only occurs
  * on x86 machines (not reproducible on amd64)
  * when using gcc optimizations (-O2 for example)
  * --with-pic

So, reproduce case:
unpack a recent 5.2 snapshot (I used php5.2-200802112130)
(on x86):
export CFLAGS=-O2
./configure --disable-all --with-mysql --with-pic && make
./sapi/cli/php -r 'mysql_connect("host", "user", "pass", true);'

Omitting the forth parameter (`true') does not trigger the problem. The values of the first three parameters doesn't matter, it segfaults even if mysql fails to connect.

Backtrace for that concrete code snippet:
Starting program: /tmp/php5.2-200802112130/sapi/cli/php -r mysql_connect\(\"host\",\ \"user\",\ \"pass\",\ true\)\;

Warning: mysql_connect(): Unknown MySQL server host 'host' (1) in Command line code on line 1

Program received signal SIGSEGV, Segmentation fault.
zend_do_fcall_common_helper_SPEC (execute_data=0xbfd98bec)
    at /tmp/php5.2-200802112130/Zend/zend_vm_execute.h:205
205                     EG(current_execute_data) = execute_data;
(gdb) bt
#0  zend_do_fcall_common_helper_SPEC (execute_data=0xbfd98bec)
    at /tmp/php5.2-200802112130/Zend/zend_vm_execute.h:205
#1  0x0817fb48 in execute (op_array=0x82d3070) at /tmp/php5.2-200802112130/Zend/zend_vm_execute.h:92
#2  0x081525b4 in zend_eval_string (
    str=0xbfd9a3d0 "mysql_connect(\"host\", \"user\", \"pass\", true);", retval_ptr=0x0, 
    string_name=0x825a72f "Command line code")
    at /tmp/php5.2-200802112130/Zend/zend_execute_API.c:1171
#3  0x0815270b in zend_eval_string_ex (
    str=0xbfd9a3d0 "mysql_connect(\"host\", \"user\", \"pass\", true);", retval_ptr=0x0, 
    string_name=0x825a72f "Command line code", handle_exceptions=1)
    at /tmp/php5.2-200802112130/Zend/zend_execute_API.c:1205
#4  0x081e7051 in main (argc=3, argv=0xbfd98fd4) at /tmp/php5.2-200802112130/sapi/cli/php_cli.c:1179

Full backtrace:

I suspect that mysql is not the cause of the problem here, it rather seems like one way to trigger that bug. We have reports from sparc/sparc64 users for whom recent php-5.2 snapshots simply crash, independent of the code used. Might be the same bug in the background, who knows.
 [2008-02-12 10:24 UTC]
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
Thank you for the report, and for helping us make PHP better.

PHP Copyright © 2001-2023 The PHP Group
All rights reserved.
Last updated: Sun Oct 01 09:01:24 2023 UTC